Wednesday 4 February 2015

33 TOP Business Intelligence Interview Questions and Answers (Part1)

1. What is Business Intelligence?
Business Intelligence is a process for increasing the competitive advantage of a business by intelligent use of available data in decision making.
The five key stages of Business Intelligence:
? Data Sourcing
? Data Analysis
? Situation Awareness
? Risk Assessment
? Decision Support

2. What is a Universe in Business Intelligence?
A "universe" is a "Business object" terminology. Business objects also happens to be the name of the company. The universe is the interfacing layer between the client and the datawarehouse . The universe defines the relationship among the various tables in the datawarehouse.
Or
Universe is a semantic layer between the database and the user interface (reports).

3. What is OLAP in Business Intelligence?
Online Analytical Processing, a category of software tools that provides analysis of data stored in a database. OLAP tools enable users to analyze different dimensions of multidimensional data. For example, it provides time series and trend analysis views. The chief component of OLAP is the OLAP server, which sits between a client and a database management systems (DBMS). The OLAP server understands how data is organized in the database and has special functions analyzing the data.
A good OLAP interface has writes an efficient sql and reads an accurate data from db.To design and architect having good knowledge on DB understanding the report requirements.

4. What are the various modules in Business Objects product?
? Business Objects Reporter
? Reporting & Analyzing tool
? Designer
? Universe creation
? database interaction
? connectivity
Supervisor - For Administrative purposes
Webintelligence - Access of report data through internet
BroadCast Agent - For scheduling the reports
Data Integrator - The ETL tool of Business Objects, designed to handle huge amounts of data

5. What is OLAP, MOLAP, ROLAP, DOLAP, HOLAP? Explain with Examples?
OLAP - On-Line Analytical Processing.
Designates a category of applications and technologies that allow the collection, storage, manipulation and reproduction of multidimensional data, with the goal of analysis.
MOLAP - Multidimensional OLAP.
This term designates a cartesian data structure more specifically. In effect, MOLAP contrasts with ROLAP. Inb the former, joins between tables are already suitable, which enhances performances. In the latter, joins are computed during the request.
Targeted at groups of users because it's a shared environment. Data is stored in an exclusive server-based format. It performs more complex analysis of data.
DOLAP - Desktop OLAP.
Small OLAP products for local multidimensional analysis Desktop OLAP. There can be a mini multidimensional database (using Personal Express), or extraction of a datacube (using Business Objects).
Designed for low-end, single, departmental user. Data is stored in cubes on the desktop. It's like having your own spreadsheet. Since the data is local, end users dont have to worry about performance hits against the server.

ROLAP - Relational OLAP.
Designates one or several star schemas stored in relational databases. This technology permits multidimensional analysis with data stored in relational databases.
Used for large departments or groups because it supports large amounts of data and users.
HOLAP:Hybridization of OLAP, which can include any of the above.

6. Why an infocube has maximum of 16 dimensions?
It depends upon the Database limits provided to define the Foreign key constraint, e.g. in Sql Server 2005, the recommended max limit for foreign keys is 253, but you can define more.

7. What is BAS? What is the function?
The Business Application Support (BAS) functional area at SLAC provides administrative computing services to the Business Services Division and Human Resources Department. We are responsible for software development and maintenance of the PeopleSoft? Applications and consultation to customers with their computer-related tasks.

8. Name some of the standard Business Intelligence tools in the Market?
Some of the standard Business Intelligence tools in the market According to their performance
? MICROSTRATEGY
? BUSINESS OBJECTS,CRYSTAL REPORTS
? COGNOS REPORT NET
? MS-OLAP SERVICES
Or
? Seagate Crystal report
? SAS
? Business objects
? Microstrategy
? Cognos
? Microsoft OLAP
7. Hyperion
8. Microsoft integrated services

9. How do we enhance the functionality of the reports in BO?
You can format the BO Reports by using various features available. You can turn the table reports into a 2-Dimensional or 3-Dimensional charts. You can apply an Alert to show some data in a different format , based on some business rule. You can also create some prompts, which will asks user to give some input values before seeing the reports, this way they will see only filtered data. There are many similar exciting options available to enhance the reports.

10. What are dashboards?
A management reporting tool to gauge how well the organization company is performing. It normally uses "traffic-lights" or "smiley faces" to determine the status.
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